Nelson Mandela lived here with his family from 1946 until his arrest in 1962.

A large-scale steel sculpture entitled 'The Shadow Boxer' pays tribute to Nelson Mandela.

Temples adorned with intricate, erotic sculptures make up one of the "seven wonders" of India.

The first English fort built in India.

This World War I fortress is the perfect place to catch a Montenegrin sunset.

Longest fortress system anywhere in Europe.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Once the legendary capital of the Dacian Kingdom, this city has been reduced to mere ruins.

Croatia's "hairy stone" fortress is one of the most well preserved Istrian castles.

Now abandoned, the world's first torpedo factory is crumbling into the sea.

The remains of a sunken military ship wreck visible through clear water.

These pools have been abandoned for over 20 years.

A crumbling World War I fort that is reached through a series of concrete tunnels.

A star-shaped fortress town fort built in the geometric model of the Renaissance utopian city.

The sinister ruins of one of the worst dam failures of the 20th century lie in this astonishing alpine setting.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

This half-finished "city of toys" was almost Italy's own Las Vegas.

A dilapidated psychiatric facility on the outskirts of Milan where electroconvulsive therapy was developed and Napoleon once lived.

Yugoslavia's biggest underground airport lies in ruins.

A once-luxurious, now abandoned hotel in the Italian Alps.

The now-abandoned Fascist summer colony served a dark purpose during World War II.

An abandoned village, frozen in time by the threat of a landslide.